CAMEL-23312: Add SpanKind support to OpenTelemetry2 component

[JiriOndrusek]

fixes https://issues.apache.org/jira/browse/CAMEL-23312
superseeds #22577

• Adds SpanKind support to the OpenTelemetry2 component to enable proper distributed tracing
  semantics
• Implements SpanKind determination through the SpanDecorator API with HTTP components using
  CLIENT/SERVER and messaging components using PRODUCER/CONSUMER
• Includes comprehensive test coverage with mock HTTP and Kafka components to verify SpanKind
  behavior and decorator property inheritance

Description

Target

• I checked that the commit is targeting the correct branch (Camel 4 uses the main branch)

Tracking

• If this is a large change, bug fix, or code improvement, I checked there is a JIRA issue filed for the change (usually before you start working on it).

Apache Camel coding standards and style

• I checked that each commit in the pull request has a meaningful subject line and body.

• I have run mvn clean install -DskipTests locally from root folder and I have committed all auto-generated changes.

[JiriOndrusek]

@squakez here is the refactored PR (much simpler and cleaner), I force pushed this change to my branch, unfortunately this blocks reopening of #22610 (I didn't know about such limitation). Therefore this is the new PR.

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• components/camel-opentelemetry2
• components/camel-telemetry

All tested modules (11 modules)

• Camel :: Common Telemetry
• Camel :: JBang :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: Validate
• Camel :: Launcher :: Container
• Camel :: Micrometer :: Observability 2
• Camel :: Observability Services
• Camel :: Opentelemetry 2
• Camel :: Telemetry :: Dev
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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